The Importance of the Impartable

The impartable cannot be moved, except according to accident. parts will be in the same place for a certain time so that they will at the same time be addressed and move. The motions of the parts are different according to the parts, and according to the motion of the whole. This difference also may be especially perceived in a sphere - there will not be the same celerity of the parts about the centre as if there were not one motion. It is necessary therefore, that in the time in which it changes it should either be in e, b, or b, c, or something of it in this, and something else of it in the other.